I Didn't Do Anything

Fantasy Over Family

Guess I've Got No Conscience

Diary of a Psychopath

I Have a Surprise for You

Only if There's Something in it for Me

Season 2

Masters of Manipulation

Documentary

Crime

Signs of a Psychopath

Investigation Discovery

Season 1

Season 3

Season 4

Season 5

Season 6

Season 7

Season 8

Season 9

This harrowing half-hour archive series revisits some of the most brutal killers in modern history, reviewing news footage and the words of the killers themselves to see which terrifying traits each killer exhibited. What are the signs...of evil?